Fix HTML5 File API `FileReader.readAsDataURL` typo.
Fix HTML5 File API `FileReader.readAsDataURL` typo.

Tarmil/websharper,intellifactory/websharper,Tarmil/websharper,Tarmil/websharper,intellifactory/websharper,Tarmil/websharper,intellifactory/websharper,intellifactory/websharper